So far so good.This timer works well and is easy to operate. I liked the fact that it took a grounded plug. I use mine on an air conditioner. I don't have to run the air all day, but can set it to turn on about an hour before I get home!THANK YOUEasy to operate! Extremely useful.These used to be excellent, but now they have chopped the quality, and that is obvious to me in several ways, as I have used these for many years. Perhaps my problem is with only one or two, but they fail to turn on sometimes. One of my uses is for an engine heater, and I hate getting engine damage in sub zero weather, just because Intermatic is now selling a cheapened, low quality product. I would rather pay a little more money if I knew where, to get something that won't fail.